Full
Outline
In conventional Split Hopkinson Pressure Bars (SHPB) experiments, the tension pulse reflected from the sample back into the incident bar will travel to the free end of the bar and then will reflect back to the sample as compression wave. As a result, the sample is loaded many times. The single-pulse loading technique of the Hopkinson pressure bars can solve the problem. This paper presents the basic principle of the single-pulse loading technique of Hopkinson pressure bars. The way to calculate the pre-fixed gap between the transfer flange and reaction mass is given. The experimental results with various pre-fixed gap are obtained. A device of the single-pulse loading technique is set up. High speed photography is applied to confirm the validation of the technique. Both the photoes and the experimental strain waves show that sample was loaded only once.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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